205219840

素因数分解:

$2^{11}\times 5^1\times 7^2\times {\mathrm{409}}^1$

素因数の和:450

約数の個数: 144

約数和(自身を含む): 574200900

約数和(自身を除く): 368981060

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 32, 35, 40, 49, 56, 64, 70, 80, 98, 112, 128, 140, 160, 196, 224, 245, 256, 280, 320, 392, 409, 448, 490, 512, 560, 640, 784, 818, 896, 980, 1024, 1120, 1280, 1568, 1636, 1792, 1960, 2045, 2048, 2240, 2560, 2863, 3136, 3272, 3584, 3920, 4090, 4480, 5120, 5726, 6272, 6544, 7168, 7840, 8180, 8960, 10240, 11452, 12544, 13088, 14315, 14336, 15680, 16360, 17920, 20041, 22904, 25088, 26176, 28630, 31360, 32720, 35840, 40082, 45808, 50176, 52352, 57260, 62720, 65440, 71680, 80164, 91616, 100205, 100352, 104704, 114520, 125440, 130880, 160328, 183232, 200410, 209408, 229040, 250880, 261760, 320656, 366464, 400820, 418816, 458080, 501760, 523520, 641312, 732928, 801640, 837632, 916160, 1047040, 1282624, 1465856, 1603280, 1832320, 2094080, 2565248, 2931712, 3206560, 3664640, 4188160, 5130496, 5863424, 6413120, 7329280, 10260992, 12826240, 14658560, 20521984, 25652480, 29317120, 41043968, 51304960, 102609920, 205219840]

約数ペア:

[(1, 205219840), (2, 102609920), (4, 51304960), (5, 41043968), (7, 29317120), (8, 25652480), (10, 20521984), (14, 14658560), (16, 12826240), (20, 10260992), (28, 7329280), (32, 6413120), (35, 5863424), (40, 5130496), (49, 4188160), (56, 3664640), (64, 3206560), (70, 2931712), (80, 2565248), (98, 2094080), (112, 1832320), (128, 1603280), (140, 1465856), (160, 1282624), (196, 1047040), (224, 916160), (245, 837632), (256, 801640), (280, 732928), (320, 641312), (392, 523520), (409, 501760), (448, 458080), (490, 418816), (512, 400820), (560, 366464), (640, 320656), (784, 261760), (818, 250880), (896, 229040), (980, 209408), (1024, 200410), (1120, 183232), (1280, 160328), (1568, 130880), (1636, 125440), (1792, 114520), (1960, 104704), (2045, 100352), (2048, 100205), (2240, 91616), (2560, 80164), (2863, 71680), (3136, 65440), (3272, 62720), (3584, 57260), (3920, 52352), (4090, 50176), (4480, 45808), (5120, 40082), (5726, 35840), (6272, 32720), (6544, 31360), (7168, 28630), (7840, 26176), (8180, 25088), (8960, 22904), (10240, 20041), (11452, 17920), (12544, 16360), (13088, 15680), (14315, 14336)]